Spring bed



0. N. FAIRNHAN.

SPRING BED.

APPLICATION FILED JUNE14, 1922.

Patented Aug. 22, 1922.

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Maaate.

Specification of Letters Patent.

Patented fing. 22, 11922,

Application filed .Tune 14.-, 1922. Serial No. 568,199.

To all whom t may concern:

Be it known that I, @RMA N. FARNHAM, a citizen of the United States, residing at Sanish, in the county of Mountrail and State of North Dakota, have invented new and useful improvements in Spring Beds, of which the following is a specification.

This invention relates to a spring bed, and the object is to provide particular means for increasing the tension of certain of the springs.

A further object is to provide means for increasing the tension of the springs extending centrally and longitudinally ot the bed, when weight is applied on both sides of the central portion of the bed and on the springs there located.

A still further object is to provide a series of elements extending longitudinally and each including a coiled spring, or springs and tension wires, the wires being connected with a stationary element at one end of the bed, and a plurality of pivotally mounted elements with which several ot the wires and springs on both sides of the central longitudinal axis are connected, the pivoted members acting to cause the tensioning of the wires immediately adjacent to the longitudinal axis, when weight is ap plied to the wires and the springs connected with the pivoted members on opposite sides of the pivotal point.

With the foregoing and other objects in View, the invention consists in the novel construction, combination and arrangement et parts hereinafter described and claimed, it being understood that modifications may be made within the scope of the claims without departing from the spirit of the invention.

ln the drawings Figure 1 is atop plan and Figure 2 is a section on the line 2--2 of Figure 1.

The transverse members of the bed are designated 10 and 12, these elements being directly connected by several wires and tension springs, at the side portions of the bed. T he longitudinal side bars are shown at 13 and 14, the wires immediately adjacent view of the bed thereto are designated 15 and the springs connected with these wires are designated 16.

Other wires 17 are connected with the springs 18 on both sides ot the central longitudinal axis, a number of wires and springs being designated by the same reference numeral or numbers.

rllhe wires are connected directly with the end member 12 for the Jfull length thereof, but the wires 17 are connected with pivoted arms or levers 2O or 21, as the case may be. The levers are 'fulcrumed by the means of the pins 28, which enter the central apertures 2st in the levers or enter one of the other apertures 25 somewhat removed from the center, so that the leverage be lvaried as the circumstances may require.

Apertures are formed in the end member 10 corresponding with the apertures in the levers, in order that the change of position may be made as required.

When weight is applied to the springs and wires on the outer side of the pivotal point of a given lever, the wires and springs on the other side ot the pivotal point will be tensioned automatically. In order to more definitely define theconstruction, the wires between the springs and the end member 10 are designated 15 and 17', and those between the springs and end member 12 are designated 15 and 17. In another sense each spring and the wires connected directly therewith, constitute a single tension element.

What is claimed is 1. In a spring bed, a plurality of end members, side bars connecting said members, pivotally mounted elements carried by the end members near the central portion thereof, resilient elements connected with the pivoted members between the pivotal points and the central longitudinal axis of the bed,'and means imparting movement to the pivoted members for increasing tension on said resilient elements.

2. ln a spring bed, a plurality of end members, side bars connected therewith, pivoted levers mounted on one of'said end members near the middle portion thereof and normally extending parallel with the p'voted element permitting of change in the position of the fuicium point of therespective levei's. l0

In testimony whereof l affix my signature.

@RMA N. FARNHAM. 

